we look at what they call weakness in cement design in the well, that's halliburton doing the seem ellening. are they pointing a finger at halliburton here? >> that's a clear finger being pointed on halliburton on that. i haven't been able to read into it far enough to find out where the decision was made to allow them to go ahead with that system. and, you know, the -- nitrogen apparently was not effective as they thought it would be. they think that the nitrogen sort of broke out or pocketed and created gaps in the cement. >> we heard in the days after the explosion about a pressure test that's showed anomalies. a pressure test was accepted. the well integrity was not established blaming both bp and pointing the finger at transocean. transocean being the people of the rig, people being contacted to drill the well. more shared blame in that instance. >> right. yeah. in that instance, again, the company man, the person representing bp usually has the ultimate decision in that although someone from transocean, if they suspect something is wrong, they certainly have the right to speak up and